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Terahertz propagation properties of free-standing woven-steel-mesh metamaterials: Pass-bands and signatures of abnormal group velocities
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10.1063/1.3638445
/content/aip/journal/jap/110/6/10.1063/1.3638445
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/6/10.1063/1.3638445

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) THz transients with (sample) and without (ref.) MTM sample B in the beam path. Note that the signal with sample has been multiplied by a factor of two. Inset: Photograph of a metal mesh, taken from the website of Haver and Boecker OHG, supplier of our samples. (b) Corresponding impulse response function g(t) = F −1{E sam(ω)/E ref(ω)}, including exponential decay fit to the envelope function.

Image of FIG. 2.
FIG. 2.

(Color online) Power spectra of single-layer MTMs. (a) Transmission spectra of all four types of MTMs. (b) Reflection and transmission spectra of sample D. The vertical arrows mark the spectral positions of the RWA minima calculated with the expression given in the text. The minimum values are 0.462 THz, 0.653 THz, 0.923 THz, and 1.032 THz for the mode numbers [m,n] specified in the graph.

Image of FIG. 3.
FIG. 3.

(Color online) Effective permittivity extracted from the measured reflection and transmission data for sample D.

Image of FIG. 4.
FIG. 4.

(Color online) Transmission spectra of single-, double- and triple-layers of meshes of type A. Distance between layers: 1.6 mm. No special measures were taken to align the holes of the various layers with respect to each other. Inset: Logarithmic plot (in dB) of the data of the main panel.

Image of FIG. 5.
FIG. 5.

(Color online) Differential group delay data for the single-layer mesh MTMs. Gray background: Power transmission spectra of Fig. 2. Negative group delay occurs only in regions of reduced transmission.

Tables

Generic image for table
Table I.

Geometrical parameters, effective plasma frequency f p, and first Rayleigh minimum of the four wire-mesh structures.

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/content/aip/journal/jap/110/6/10.1063/1.3638445
2011-09-19
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Terahertz propagation properties of free-standing woven-steel-mesh metamaterials: Pass-bands and signatures of abnormal group velocities
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/6/10.1063/1.3638445
10.1063/1.3638445
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